Day and night thermostat



March 17, 1931. l.. R. TEEPLE DAY AND NIGHT THERMOSTAT Filed Aug. 6, 1929 2 Sheets-Sheen l N\ HT /Au/ENTD/ L. RYEEPLE March 17, 1931. L. R. TEEPLE DAY AND NIGHT THERMOSTAT Filed Aug. 6, 1929 2 Sheets-Sheet 2 /N//E-/v TDR 1 l2 TEEPLE /4 TTDR/vE-v/ Patented Mar. 17, 1931 UNITED STATES PATENT OFFICE 'DAY AND NGHT THERMOSTAT Application filed August 6, 1929. Serial No. 383,954.

This invention relates generally to thermostatic switches, and particularly to that type 'of switches having means for automatically shiting the setting of the thermostat .a for day and night use.

The main object of this invention is to provide a thermostat with two control circuits and means for automatically shifting from one control to the other at predeterminable intervals of time, under the control of the operator..

The second object is to so construct this device that the removal of the time control element for winding or resetting purposes in no way requires the breaking of an electrical circuit or involves any diiiiculty in handling beyond the scope of the most unskilled person.

These, and other objects, will become more apparent from the specification following as illustrated in the accompanying drawings, in which:

Figure 1 is a front elevation of the device with the cover removed. Figure 2 is a rear elevation. Figure 3 is a section taken along the line 3 3 in Figure 1. Figure 4 is a section taken along the line 4.-4 in Figure 1. Figure 5 is a section taken along the line 5-5 in Fi re 1 showing the parts in a day position. igure 6 is a fragmentary sectlon showing the parts in a night position.

Figure 7 is a view of the setting dial. Figure 8 is a diagram of the wiring.

Similar numbers of reference refer to similar parts throughout the several views.

Referring in detail to the drawings, the device includes a base 10 upon which is mounted a thermostat cover 11 which is held in place by the screws 12 and supports the 10 usual thermometer 13. Within the cover 11 are placed the day thermostat 14 and the night thermostat 15, both of which are in the form of spiral elements, the former having its innermost portion mounted on a fixed post 16 and the latter on a fixed post 17. Be-

hind the post 16 is hinged the arm 18 which is provided with a slotted end 19 into which extends a lug 20 projecting from a control arm 2l which is pivoted on the central 5G stud 22.

provided with a projecting lug 34 which extends into a slot 35 on the arm 36 which is hinged behind the post 17.

The outer end 37 of the day thermostat 14 is provided with a pair of contact points 38 Which are interposed between the adjustable contacts 39 and 40. The outer end 41 of the night thermostat 15 is provided with a pair of contact points 42 which are interposed between the adjustable contacts 43 and 44.

The mechanism thus far described is merely a double thermostat, or one having two separate thermostatic elements for controlling two separate circuits representing the day and night circuits referred to.

Turning now to the means for selecting the particular circuit to be used it will be seen to consist of aclock 45 which is mounted on the base y10 by merely slipping the upturned ear 46 on the upper portion of its back 1nto an opening 47 provided therefor, and then pushing a perforated ear 48 past a spring latch 49 on the base 10. On the back of the clock 45 is provided a dial 50 which is mounted on a pivot 51, which rotates once in twenty-four hours and bears on its face twenty-four hour divisions in two series ranging from 1 to 12. One portion 52 of the dial bounded by' the numerals 6,' constituting one half of the dial is colored dark to represent night and the other half is provided with a hghter color.

Adjustably mounted on the pivot 51 are also the relatively short day arm 53 and a long vnight arm 54. These arms are adjustably under the control of the 'nut 55 and the lock washer 56. The arm 53 is provided with a backwardly turned shoe 57 and the arm 54 is provided with a back Wardly turned shoe 58. The base is provided with a back 59 on whose lower portion is secured a standard 60 which carries a rocker frame 61 which supports a roller 62 adapted to en- 5 gage either of the shoes 57 or 58 as they pass by the roller 62. f

To the frame 61 is hinged a. contact arm 63 which is urged to one side or the other of its center bythe Vspring 64. Inl other m'words, if the shoe 58 is pressed a ainst the roller 62 in passin (as shown in igure6) thenthe arm 63 is rought into engagement with the contact 65, which is joined by the wire 66 to the terminal 67, and if the shoe 57 should bear'against the roller 62 the con-v tact 63 is moved into engagement with the contact 68 which is joined by the wire 69 to the terminal 70.

Referring now to Figure '8 wherein is 2n shown diagrammati'cally the electrical circuits of the device and in which is included a battery or source of low voltage power 71 and a relay 72 bypmeans of which current fromthe power line 73 can be supplied to 2 5 or cut olf from a motor 74, or other device.

The operation ofthe device is as follows: Assuming that the position of the dial 50 (which is of course 45) has brought the shoe 58 into contact with the roller 62 (as shown in Figure 6) it will be seen that the arm 63 is now brought into engagement with the contact 65. If the thermostat 15 happens to betouching the on side, or contact 44, current will flow back through the wire 75 to the circuit closing side of the relay 72, causing the motor 74 to be operated. This operation will continue until the thermostat element 15 moves to the off side, or contact 43, which now causes the current to flow through the wire 76 to the olf side of the relay 72, thereby stoping the motor.

It must be borne in mind that the setting of the contacts 43 and 44 has been determined for night use only and is entirely under the control of the set screws upon which the contact points 43 and 44 are mounted.

As the dial rotates on its axis until the day arm 53 comes into contact with the j roller 62 the position of the arm v63 is reversed, bringing same into engagement with the contact 68 wherein the same actions takeplace, this time, however, at the thermostat 14 and within the range of temperatures determined by the setting of the day thermostat.

While I have referred to day and night arms, these are clearly arbitrary terms, since both of the arms may be set to function at the same portion of the day or night, as' Well as in opposite portions thereof. It will be seen that by this construction it is' entirely unnecessary to do anything more than to lift the clock oi of its support .65 for the purpose of gaining access to its. winddetermined by the clock ing or setting portion, thereby greatly simplifying this procedure, as well as overcoming the objectionable making or breaking of the circuits as is the common practice.

It can also be seen that by this construction the actuating mechanism for the roller 62 is in front of the roller at all times and the clock can be placed in position or removed therefrom without lany regard to the relative position of the arms 53 and 54.

A ground wire 77 from the terminal 78 connects with the relay 72. It will be understood that the roller 62 is grounded to the frame 10 and is therefore in effect connected with. the terminal 78, which is a ground terminal; whereas the contacts 39 and 43 are connected to a binding post 43-A and the contacts40 and 44 are connected to the binding post 44-A. Both the binding posts 43A and i4- A are insulated from the base 10.

I am aware that day and night thermostats -have previously been constructed; it is therefore not my intention to cover such devices broadly, but I do intend to cover all such forms and modifications thereof as fall fairly within the appended claims.

I claim:

1. In a day and night thermostat the combination of a two-way switch having its contact arm rockably mounted, a roller on said arm positioned in a manner that the pressure near one end of said roller will move said switch in one direction and a pressure near the opposite end of the roller will move said switch in an opposite direction, and spring means for urging said arm in a direction toward which it is moved.

2. In a day and night thermostat the com vbination of a two-way switch having its contact arm rockably mounted, a roller on said arm positioned in a manner that a pressure near one end of said roller will move said switch in one direction and a pressure near the opposite end of the roller will move said switch in an opositedirection, spring means for urging sai arm in a direction toward which it is moved, and a time train having a pair of relatively adjustable arms driven therebyadapted to exert pressures alternatively against opposite sides of said roller.

.3. In a day. and night thermostat the combination of a base having a pair of thermostats mounted therein, a two-way switch Amounted in said base adapted to render either of said thermostats operative, a rocker frame support' the blade of said switch aving a spring or urging'same toward eit er extreme positlon, a time train\ for actuating .said switch, a pair of adjustably revolvable arms drivenby said time train adapted to engage the front side of said roller near opposlte ends thereof for the purpose of reversing said switch 'each time one of said arms moves past said roller. Y f

ilo'

4. day and night switch consisting of a base having a closed front rovided with an opening at one end thereof or the mounting of a time piece, a time piece havin an upwardly extending hook at the top o the rear side thereof for engaging said base having a spring latch at the bottom end thereof, a revolvable dial mounted on the back of said time piece projectino' into said base, a pair of arms on said dialbhaving rearwardly extending projections formed thereon, a rocker frame mounted on said base having a longitudinal roller therein whose opposite ends can engage said rearwardly extending rojections as they revolve with said dial 1n a manner to be rocked thereby, and a switch blade mounted on said rocker frame having spring means for urging same in either of two directions.

5. A two-way switch having a pivotally mounted frame, a roller mounted on said frame transversely with the pivot thereof, a switch blade mounted on said frame parallel with the axis of said roller, La pair of contacts mounted on opposite sides of the end of said blade, and a spring between the end of said blade and said frame adapted to urge said blade into engagement with either of said contacts.

LAWRENCE R. TEEPLE. 

